Patents by Inventor Ray M. Marklnd

Ray M. Marklnd has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dopplerized echo repeater
    Patent number: 4991144
    Abstract: The present invention relates generally to submarine simulating decoy and particular is a sonar system for receiving the acoustical search pulse from an enemy or other vehicle and converting it into a dopplerized sonar signal which is then broadcast back to the enemy vessel for deception and tactical combat purposes.
    Type: Grant
    Filed: March 29, 1963
    Date of Patent: February 5, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Keith E. Geren, Ray M. Marklnd